Chip size atomic clock

Installation dimensions

Atomic clock on a chip

Main indicators

ATOM33 CPT atomic clock

Pin definition

Features

  • Lightweight and miniaturized

  • +5v single power supply, low power consumption

  • UART serial communication

  • Fully compatible with SA. 33

  • External second synchronization and 1PPS output

  • TOD short message output

Test items Technical indicators
Output frequency 10MHz
Output level ≥HCMOS level
Factory frequency accuracy (25℃)≤±5.0E-11
Short term stability ≤1.0E-10/1s
≤3.0E-11/10s
≤1.0E-11/100s
Phase noise(SSB) ≤-90dBc/Hz@10Hz
≤-120dBc/Hz@100Hz
≤-140dBc/Hz@1kHz
≤-145dBc/Hz@10kHz
Frequency drift ≤2.5E-11/day
Steady state power consumption(25℃) ≤3W@+5V
Maximum power consumption ≤10W@+5V
Start-up characteristics(25℃) ≤6 minutes lock
Frequency adjustment range ≥±2E-8
Frequency adjustment accuracy ≤1E-12(digital adjustment)
External second synchronization accuracy1PPS synchronization accuracy≤±50ns
External second taming accuracy≤1E-12(24-hour frequency accuracy average after 1 day of taming)
Maintain accuracy ≤1μs(time difference maintained for 24 hours after 1 day of taming)
Range of working temperature -40℃~+70℃
Frequency temperature characteristics ≤5E-10
Storage temperature range -55℃~+100℃
MTBF >100,000h
Dimensions 50.8(±0.5)×50.8(±0.5)×17.8(±0.3)
Weight ≤100g
Pin number Function name Pin numberFunction name
11PPS input 6TXD
2Chassis7RXD
310MHz output8Lock indication
4GND(signal & power) 91PPS output
5+5V 11NC

As the leading manufacturer of atomic clocks in China, Semiatom Photonics Co., Ltd. is committed to delivering state-of-the-art timekeeping solutions that meet the highest standards of precision and reliability. Our expertise and dedication to innovation ensure that our products remain at the cutting edge of technology, serving the needs of various high-tech industries worldwide.

Features of CPT Atomic Clock by Semiatom Photonics Co., Ltd.

  • Ultra-High Precision

  • Long-Term Stability

  • Compact and Robust Design

  • Low Power Consumption

  • Fast Warm-Up Time

  • High Reliability and Longevity

  • Versatile Application Range

  • Advanced Frequency Control

  • User-Friendly Interface

  • Cutting-Edge Technology

Steady-state power consumption(25℃):

  • 150mW@3.3V

Short-term stability:

  • ≤3.0E-10/1s
≤1.0E-10/10s
≤3.0E-11/100s

Steady-state power consumption(25℃):

  • ≤3W@+5V

Short-term stability:

  • ≤1.0E-10/1s
≤3.0E-11/10s
≤1.0E-11/100

Steady-state power consumption(25℃):

  • ≤6W @5V, max current 3.6A

Short-term stability:

  • ≤5.0E-11/1s
≤1.8E-11/10s
≤7.0E-12/100s
≤3.0E-12/1000s